图像与视频

gemini-nano-banana-2.1

Model ID:gemini-nano-banana-2.1

谷歌旗舰生图模型

Context window	—
Billing method	Per Use (CNY / Use)
Unit Price (CNY / Time)	1K ¥0.25 / 2K ¥0.35 / 4K ¥0.5
Multiplier	1.00x

Prices by channel

Channel	Unit Price (CNY / Time)	Multiplier
bananarouter-banana	¥0.25	1.00x
bananarouter-banana	¥0.35	1.00x
bananarouter-banana	¥0.5	1.00x

Call example

This model belongs to the图像与视频group, calling protocol:网关媒体生成接口（图片按次、视频按秒计费）Enter your API Key to use; groups determine the entry point and cannot be mixed (e.g., models in the Gemini group cannot use /v1/messages).

Request examplecurl

curl https://www.relay-api.com/v1/images/generations \
  -H "Authorization: Bearer sk-你的Key" \
  -H "content-type: application/json" \
  -d '{
    "model": "gemini-nano-banana-2.1",
    "prompt": "一只在草地上奔跑的柯基，清晨逆光",
    "n": 1,
    "size": "1024x1024"
  }'

# 图生图 / 改图：参考图走 base64（data URL 或裸 base64 都收，最多 4 张）
# curl https://www.relay-api.com/v1/images/generations \
#   -H "Authorization: Bearer sk-你的Key" \
#   -H "content-type: application/json" \
#   -d '{"model":"gemini-nano-banana-2.1","prompt":"把背景换成雪景","image":["data:image/png;base64,<BASE64>"]}'

响应：网关把上游原始 JSON 透传回来（sk- 密钥不加包装；浏览器会话加 {code,data} 包装）——图片为 images 响应（url / b64_json），视频为 generateContent 响应。

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